﻿<!DOCTYPE html>
<html>

<head>
    <title>video recoder</title>
    <script src="fileSaver.js"></script>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
</head>
<style>
    body {
        background-color: #EFEDEF;
    }
</style>

<body>
    <article style="border:1px solid white;width:400px;height:400px;margin:0 auto;background-color:white;">

        <section class="experiment" style="width:320px; height:240px;border:1px solid green; margin:50px auto;">
            <div id="videos-container" style="width:320px; height:240px;">
            </div>
        </section>
        <section class="experiment" style="text-align:center;border:none; margin-top:20px;">
            <button id="openCamera">打开摄像头</button>
            <button id="start-recording" disabled>开始录制</button>
            <button id="save-recording" disabled>保存</button>
            <!--<a href="javascript:void(0)" onclick="send()">发送</a>-->
        </section>
    </article>
    <script>
        var mediaStream;
        var recorderFile;
        var stopRecordCallback;
        var openBtn = document.getElementById("openCamera");
        var startBtn = document.getElementById("start-recording");
        var saveBtn = document.getElementById("save-recording");
        openBtn.onclick = function() {
            this.disabled = true;
            startBtn.disabled = false;
            openCamera();
        };

        startBtn.onclick = function() {
            this.disabled = true;
            startRecord();
        };

        saveBtn.onclick = function() {
            saver();

            // alert('Drop WebM file on Chrome or Firefox. Both can play entire file. VLC player or other players may not work.');
        };

        var mediaRecorder;
        var videosContainer = document.getElementById('videos-container');

        function openCamera() {
            var len = videosContainer.childNodes.length;
            for (var i = 0; i < len; i++) {
                videosContainer.removeChild(videosContainer.childNodes[i]);
            }

            var video = document.createElement('video');

            var videoWidth = 320;
            var videoHeight = 240;

            video.controls = false;
            video.muted = true;
            video.width = videoWidth;
            video.height = videoHeight;
            MediaUtils.getUserMedia(true, true, function(err, stream) {
                if (err) {
                    throw err;
                } else {
                    // 通过 MediaRecorder 记录获取到的媒体流
                    console.log();
                    mediaRecorder = new MediaRecorder(stream);
                    mediaStream = stream;
                    var chunks = [],
                        startTime = 0;
                    video.srcObject = stream;
                    video.play();

                    videosContainer.appendChild(video);
                    mediaRecorder.ondataavailable = function(e) {
                        mediaRecorder.blobs.push(e.data);
                        chunks.push(e.data);
                    };
                    mediaRecorder.blobs = [];

                    mediaRecorder.onstop = function(e) {
                        recorderFile = new Blob(chunks, {
                            'type': mediaRecorder.mimeType
                        });
                        chunks = [];
                        if (null != stopRecordCallback) {
                            stopRecordCallback();
                        }
                    };
                }
            });
        }

        // 停止录制
        function stopRecord(callback) {
            stopRecordCallback = callback;
            // 终止录制器
            mediaRecorder.stop();
            // 关闭媒体流
            MediaUtils.closeStream(mediaStream);
        }

        var MediaUtils = {
            /**
             * 获取用户媒体设备(处理兼容的问题)
             * @param videoEnable {boolean} - 是否启用摄像头
             * @param audioEnable {boolean} - 是否启用麦克风
             * @param callback {Function} - 处理回调
             */
            getUserMedia: function(videoEnable, audioEnable, callback) {
                navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia ||
                    navigator.msGetUserMedia || window.getUserMedia;
                var constraints = {
                    video: videoEnable,
                    audio: audioEnable
                };
                if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
                    navigator.mediaDevices.getUserMedia(constraints).then(function(stream) {
                        callback(false, stream);
                    })['catch'](function(err) {
                        callback(err);
                    });
                } else if (navigator.getUserMedia) {
                    navigator.getUserMedia(constraints, function(stream) {
                        callback(false, stream);
                    }, function(err) {
                        callback(err);
                    });
                } else {
                    callback(new Error('Not support userMedia'));
                }
            },

            /**
             * 关闭媒体流
             * @param stream {MediaStream} - 需要关闭的流
             */
            closeStream: function(stream) {
                if (typeof stream.stop === 'function') {
                    stream.stop();
                } else {
                    let trackList = [stream.getAudioTracks(), stream.getVideoTracks()];

                    for (let i = 0; i < trackList.length; i++) {
                        let tracks = trackList[i];
                        if (tracks && tracks.length > 0) {
                            for (let j = 0; j < tracks.length; j++) {
                                let track = tracks[j];
                                if (typeof track.stop === 'function') {
                                    track.stop();
                                }
                            }
                        }
                    }
                }
            }
        };

        function startRecord() {
            mediaRecorder.start();
            setTimeout(function() {
                // 结束
                stopRecord(function() {
                    alert("录制成功!");
                    openBtn.disabled = false;
                    saveBtn.disabled = false;
                    //send();
                });
            }, 5000);
        }

        function saver() {
            var file = new File([recorderFile], 'msr-' + (new Date).toISOString().replace(/:|\./g, '-') + '.mp4', {
                type: 'video/mp4'
            });
            saveAs(file);
        }

        function send() {
            var file = new File([recorderFile], 'msr-' + (new Date).toISOString().replace(/:|\./g, '-') + '.mp4', {
                type: 'video/mp4'
            });
            var data = new FormData();
            data.append("username", "test");
            data.append("userfile", file);

            var req = new XMLHttpRequest();
            req.open("POST", "com.spinsoft.bip.frame.utils.image.saveMp4.biz.ext");
            req.send(data);
        }
    </script>

</body>

</html>